Balanced input, 30Hz 12dB/oct low cut filter, clip limiter, volume control, signal-power-clip-protect led display and +/-18V regulator all this circuit on single pcb thanks to Willy.
niiice
selectable SE/balanced input ?
input impedance ?
Most of people can not find 120V or 160 V capacitors in their place, 10000uF/63V is easy to find anywhere for lower price than any other capacitor. Best solution is to reduce rail voltage to +/-95V and use standard PSU circuit with 6x10000uF/100V capacitors.
agree. the little extra power is just not worth the cost.
10k must be hot (1.5W disipation), you can use 5W resistor.
Here's Rev1.2 using 10K/5W resistor.
Regards,
Attachments
Balanced input, 30Hz 12dB/oct low cut filter, clip limiter, volume control, signal-power-clip-protect led display and +/-18V regulator all this circuit on single pcb thanks to Willy.
Heres the file's....
Attachments
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APEX BA1200 Input & Display Rev1.4 PCB.pdf35.1 KB · Views: 1,469
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APEX BA1200 Input & Display Rev.1.4 Silk.pdf68.3 KB · Views: 1,461
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APEX BA1200 Input & Display Rev1.4 PCB Mirror.pdf35.1 KB · Views: 1,421
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APEX BA1200 Input & Display Rev1.4 Gray.pdf98.2 KB · Views: 1,673
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APEX BA1200 UNPUT DISPLAY Rev1.4 Green.jpg704.5 KB · Views: 2,797
Protect pcb...
Protect Files...
Attachments
@tinitus will you be using fans blowing in from underneath ?
have thought about it
hope the natural convection will work
but I will definately have wheels
Attachments
Heres the file's....
Thank you so much Wiljj78 for being so generous...
double bridge please
Use double bridge 35A in parallel
Attachments
Last edited:
tinitus,
What difference does the center tap and and 220nf caps make to the circuit. Will it be more positive as just not to use the center tap ?
just because of available trafos, series connected, thats all
mile shows it like that for the highest power, for the same reason, available trafos
might be ok to use only one 220nf on each trafo
but someone suggested that series connected trafos should better have two 'snubber caps'
I think snubber resistors are still missing
i have 2pcs 12,000uF 63V filter capasitor..what is the maximum voltage of transformer do i used for this filter..is it ok if i used 50- 0 -50 AC ??i plan to build this circuit
if its you first amp I would suggest smaller amp
your 63V caps would be fine for 100watt amp
use max 40V trafo
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